138173169 has 8 divisors (see below), whose sum is σ = 190173952. Its totient is φ = 89143920.

The previous prime is 138173153. The next prime is 138173179. The reversal of 138173169 is 961371831.

138173169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138173169 - 2⁴ = 138173153 is a prime.

It is a super-2 number, since 2×138173169² = 38183649263005122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138173179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742774 + ... + 742959.

It is an arithmetic number, because the mean of its divisors is an integer number (23771744).

Almost surely, 2^138173169 is an apocalyptic number.

It is an amenable number.

138173169 is a deficient number, since it is larger than the sum of its proper divisors (52000783).

138173169 is a wasteful number, since it uses less digits than its factorization.

138173169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485767.

The product of its digits is 27216, while the sum is 39.

The square root of 138173169 is about 11754.7083757956. The cubic root of 138173169 is about 516.9809886670.

The spelling of 138173169 in words is "one hundred thirty-eight million, one hundred seventy-three thousand, one hundred sixty-nine".